added initial exercises directory

Author: alexoah

W3School-CSExercises/README.md

@@ -0,0 +1,8 @@
+# Introduction
+All these files are from doing [W3Schools' C# Exercises](https://www.w3schools.com/cs/exercise.asp)  
+Total: 58 Exercises.
+
+**list to be added later**
+
+##
+<sup>:octocat: Created by [@alexoah](http://github.com/alexoah) at GitHub.</sup>